Dispensing device with safety lock



Nov. 19, 1929. J. B. CRAVEY ET AL 1,736,489

DISPENSING DEVICE WITH SAFETY LOCK Filed Nov. 22. 1928 r l l -||l h H vI I Q A 4 *1 INVENTOR5 775x. v 1 -R.

ATTORNEYS.

Patented Nov. 19, 1929 UNITED STATES PATENT OFFICE JAIES B. CBAVEY ANDPAUL R PIEBBON, O1 MONTGOMERY, ALABAMA DISPENSING DEVICE WITH SAFETYLOCK Application fled November 28, 1928. Serial No. 821,123.

operation of the pump will not furnish the gasoline or oil to the personendeavoring to steal the same.

A second important object of the invention is to provide an improvedarrangement of dispensing-pump wherein the suction pipe of the pump may,if desired, be opened to the air so that o ration of the pump while thesuction pipe is thus open will not result in the pumping of the liquiThis is necessary because it is uite common for thieves to break thelocks 0% the handles of the pumps when the stations are closed for thenig t and pump the gasoline from the underground tank to the loss of theowner ofthe station.

A third object of the invention is to provide a device of this characterin which the control of the air admission will be so disposed as to beinvisible and inaccessible to the unlawful operator.

A fourth object of the invention is to provide a novel device of thischaracter wherein the suction to the pump ma be vented from the interiorof an adjacent uilding, say the ofiiee of the station, or home of theowner.

With the above and other objects in view as will be hereinafterapparent, the invention consists in general 0 certain novel details ofconstruction and combinations of parts hereinafter fully. described,illustrated in the accompanying drawings and specifically claimed.

In the accompanying drawings like characters of reference indicate likeparts in the several views, and in the drawing, the figure is a verticalelevation partly in section, showing a pumping device connected to anunderground storage tank with a venting control remotely situated, as ina building. The control here shown is a by-pass pipe connected to theintake pipe of the pump.

In the embodiment disclosed in the drawing, it will be seen that thereis shown a dispensing device of ordinar construction indicated ingeneral at 10and aving within the lower part of its casing a pump 11provided with the usual operating means and with the usual operatingcontrols. This pump is provided with the usual suction pipe 14 leadingfrom an underground'storage tank T and delivery pi e 26.

n the device shown in the drawing there is provided just below the pump11 a T fitting 16 from which extends a branch pipe 23 which leads offfrom the suction pi e 14 to a suitable point in the interior of aBuilding or ofiice and within such building or ofiice is provided withan ordinary valve 24 so that the branch 23 may be opened to theatmosphere or closed as desired.

When the operator wishes to shut down the pump for any length of time,as during his absence or at night, he simply opens the valve 24. Underthese circumstances operation of the pump will not pump gasoline.

There has'thus been provided a simple and eflicient device of the kinddescribed and for the purpose specified.

It is obvious that minor changes may be made in the form andconstruction of the in vention without departing from the materialspirit thereof. It is not,therefore, desired to confine'the invention tothe exact form herein shown and described, but it is desired to includeall such as properly come within the scope claimed.

It may particularly be pointed out that the tank or not, provided with ahousing or caspipe at said remote invention is in no sense limited tothe particular form of pump shown. The pump may be any kind of suctionpump, rotary or reciprocating, provided with an elevated storage ing ornot;

he present case is in part a continuation of our copending application,Ser. No. 184,389 filed April 26, 1927. e

The pump, if of the type shown in the drawing by way of illustration,may be operated by a handle or crank 25, and may deliver the gasoline,etc., through ipe 26 connected to a flexible hose 27. A eck valve 28 anda hand valve 29 may be provided on the outlet line. A fill line is shownat the right for filling the tank T.

Having thus described the invention, What is claimed as new is:

1. In a device for dispensing liquids, the combination of an undergroundstorage tank, a pump having a delivery pipe and having a suction pipeleading from said tank, a branch pipe concealed from view and connectedto .a delivery pipe said suction pipe at a point concealed from view,said branch pipe being large enough to admit suflicient air to thesuction pipe to destroy the suction therein, said branch pipe having anair inlet valve at a point within an inclosure remote from said pump,such branch pipe being wholly independent of the deliver pipe and beingin addition to all pipes t rough which liquid flows during the entireoperation of the device, and the said air inlet valve' being operablewholl independently ofall other parts of said dispensing device. l

2. A device as covered in claim 1, in which the air inlet valve islocated within a building, and said pump is located outside of saidbuilding. 7 e

3. In a liquid dispensing device including an underground liquid storagetank, a. 'ump provided with a suction pipe and a do 'very 1 ,pipe andwith controls, a branch pipe entering said suction pipe at a concealedpoint between sai d pump and said liquid storage tank, said branch pipebeing large enough to admit suflicient air to said suction pipe todestroy the suction therein, said branch pipe being concealed from viewand leadin to a point remote from saidpum and a va ve o ening andclosing the end 0 said branchpipe remote from said pump, said valvebeing operable entirely independently of the controls of said pump.

4. In a liquid dispensing device includin a liquid storage tank disposedundergroun a pump includin controls, a suction pi e and ior said pump, athe t preventing device including a branch pipe enter: ing said suctionpipe at a point below the surface of the ground, said branch pipe beingsuificiently large to admit sufiicient air to destroy the suction insaid suction pipe, said tures.

JAMES B. CRAVEY. PAUL R. PIERSON.

